marasmus (n.) Look up marasmus at Dictionary.com
"wasting away of the body," 1650s, Modern Latin, from Greek marasmos "a wasting away, withering, decay," from marainein "to quench, weaken, wither," from PIE root *mer- "to rub away, harm." Maras (n.) evidently in the same sense is attested from mid-15c. Related: Marasmic.